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Finding the Fourth Proportional to 91,158.36, 125,736.40 and 79,200.60

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Solution

The fourth proportional to 91,158.36, 125,736.40 and 79,200.60 is: 109,242.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,158.36 : 125,736.40 = 79,200.60 : x
  2. Step 2: Convert to fraction form
    91,158.36/125,736.40 = 79,200.60/x
  3. Step 3: Cross multiply
    91,158.36x = 125,736.40 × 79,200.60
  4. Step 4: Simplify right side
    91,158.36x = 9,958,398,321.84
  5. Step 5: Solve for x
    x = 9,958,398,321.84/91,158.36
  6. Step 6: Final answer
    x = 109,242.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.